Define a commodity hardware? Does commodity hardware include ram?
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On what basis name node distribute blocks across the data nodes?
What happens to job tracker when namenode is down?
What is a Task instance in Hadoop? Where does it run?1
Is it possible to provide multiple inputs to hadoop? If yes, explain.
Which is the best hadoop certification?
Rack awareness of Namenode?
How to write a Custom Key Class?
How can you connect an application
how to share the metastore within multiple users?
when hadoop enter in safe mode?
What is the default replication factor?
Explain how input and output data format of the hadoop framework?
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